Der Riese who is group 935?

Who is group 935 from the elevate your sences acheivement i also read the chalk boards in the juggernaut teleport room and they said that group 935 was a sucess and said you must survive rounds 5-8 what does this mean ive done the teddy bear game as well ive kill the one in the window one wiht juggernog killed the monkey what does all thsi mean answer these questions like 1. 2. 3. please and if some one could shed some light on why is there a teddy bear challenge and why is there a red on on the moon?